Nuxt•13mo ago

$fetch catches error, but not able to read body

Hi, I must be missing something. I'm attempting to get a $fetch error and it's JSON body, but it simply returns 'POST (url) 422 Unprocessable Entity)

async function onSubmit(event: FormSubmitEvent<any>) {
  form.value.clear()
  try {
    const response = await $fetch('/api/skin/', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: {
        email: state.email,
        password: state.password
      }
    });

    if (!response.ok) {
      const responseBody = await response.json(); // read the response body
      console.error("the error", responseBody);
      return;
    }

    console.log("ok!");
  } catch (err) {
    console.error("the error", err);
  }
}

async function onSubmit(event: FormSubmitEvent<any>) {
  form.value.clear()
  try {
    const response = await $fetch('/api/skin/', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: {
        email: state.email,
        password: state.password
      }
    });

    if (!response.ok) {
      const responseBody = await response.json(); // read the response body
      console.error("the error", responseBody);
      return;
    }

    console.log("ok!");
  } catch (err) {
    console.error("the error", err);
  }
}

17 Replies

KyllianOP•13mo ago

even with useFetch it somehow returns this, and the data maintains empty within the 'network' tab I can see it just fine

manniL•13mo ago

@Kyllian $fetch does already to the conversion for your 😉 no need to check for response.ok and to convert to JSON as with the plain fetch api

manniL•13mo ago

https://github.com/unjs/ofetch?tab=readme-ov-file#%EF%B8%8F-json-body

GitHub

GitHub - unjs/ofetch: 😱 A better fetch API. Works on node, browser ...

😱 A better fetch API. Works on node, browser and workers. - GitHub - unjs/ofetch: 😱 A better fetch API. Works on node, browser and workers.

KyllianOP•13mo ago

ah there is an ignoreResponseError, damn that's so easy, thanks man

manniL•13mo ago

no problem 👍

KyllianOP•13mo ago

it's so easy you overlook it haha

fmeyjr•13mo ago

I have a similar problem, that the body is undefined on the server. In my store, I have the following function:

const addOffice = async () => {
      if (!state.city || !state.name || !state.street || !state.zip) {
        return;
      }
      
      // TODO put this in util
      // The first letter of Name, Street and city need to be uppercase
      state.name = state.name.charAt(0).toUpperCase() + state.name.slice(1);
      state.street = state.street.charAt(0).toUpperCase() + state.street.slice(1);
      state.city = state.city.charAt(0).toUpperCase() + state.city.slice(1);

      const reqBody = {
        name: state.name,
        street: state.street,
        city: state.city,
        zip: state.zip,
        organizationId: organizationID,
      }
      console.log("Add office: reqBody", reqBody);

      try {
        const office = await $fetch("/api/offices", {
          method: 'post',
          body: reqBody,
        });
      } catch (error) {
        toast.add({ title: `Fehler beim Erstellen von Büro.`, color: "red" });
        return;
      }
...

const addOffice = async () => {
      if (!state.city || !state.name || !state.street || !state.zip) {
        return;
      }
      
      // TODO put this in util
      // The first letter of Name, Street and city need to be uppercase
      state.name = state.name.charAt(0).toUpperCase() + state.name.slice(1);
      state.street = state.street.charAt(0).toUpperCase() + state.street.slice(1);
      state.city = state.city.charAt(0).toUpperCase() + state.city.slice(1);

      const reqBody = {
        name: state.name,
        street: state.street,
        city: state.city,
        zip: state.zip,
        organizationId: organizationID,
      }
      console.log("Add office: reqBody", reqBody);

      try {
        const office = await $fetch("/api/offices", {
          method: 'post',
          body: reqBody,
        });
      } catch (error) {
        toast.add({ title: `Fehler beim Erstellen von Büro.`, color: "red" });
        return;
      }
...

and on my server route server/api/offices/index.post.ts, i have the function:

export default defineEventHandler(async (event) => {
  const client = await serverSupabaseClient<DB>(event);
  const user = await serverSupabaseUser(event);

  // Throw error if no user is found
  if (!user) {
    throw createError({ statusCode: 401, statusMessage: "Unauthorized" });
  }

  // Get all offices from the request body
  const { body } = await readBody(event);
  console.log("post office readBody", body);

  // Throw error if there is no body
  if (!body) {
    throw createError({ statusCode: 400, statusMessage: "Bad Request. No body found!" });
  }
...

export default defineEventHandler(async (event) => {
  const client = await serverSupabaseClient<DB>(event);
  const user = await serverSupabaseUser(event);

  // Throw error if no user is found
  if (!user) {
    throw createError({ statusCode: 401, statusMessage: "Unauthorized" });
  }

  // Get all offices from the request body
  const { body } = await readBody(event);
  console.log("post office readBody", body);

  // Throw error if there is no body
  if (!body) {
    throw createError({ statusCode: 400, statusMessage: "Bad Request. No body found!" });
  }
...

However, the body is undefined on the server. What do i miss?

manniL•13mo ago

don't destructure 🙂 should be const body not const { body }

fmeyjr•13mo ago

Its absolutely funny how its always the little things. Thanks!

keco39•12mo ago

This answer means it's not possible to get the error object from a $fetch request (you have to use ofetch)? I was hoping I didn't have to install another package for that... My use case is the following: there is no up-to-date package for Campaign Monitor (for Nuxt/Vue/Node) so I created a couple of API endpoints to call CM myself (like this: const response: string = await $fetch(https://api.createsend.com/api/v3.3/subscribers/${listid}.json, { method: "POST", body: body, headers: { Authorization: Basic ${authToken} } });). When an error occurs, I only see "400 Bad Request" and a stacktrace but I'm missing the underlying reason (so I have to use tools like PostMan to check what the actual error is).

manniL•12mo ago

ofetch and $fetch are the same ☺️

This answer means it's not possible to get the error object from a $fetch request

No. try/catch it 👍

fmeyjr•12mo ago

Use try and catch

keco39•12mo ago

I did do the try catch but the error object looks just like a string... Or can I pass "ignoreResponseError: true" as an option to $fetch (TS isn't recognizing it it seems...). Or read err.data without the ignore option? Because TS also says it does not know .data and I don't really know of which type the error is. This is the whole thing actually...

try {
    const body: CampaignMonitorSubscriptionRequest = { EmailAddress: payload.email, Name: payload.name, Resubscribe: true, ConsentToTrack: "Yes" };
    const response: string = await $fetch(postUrl, { method: "POST", body: body, headers: { Authorization: `Basic ${authToken}` } });

    if (import.meta.dev) {
      // eslint-disable-next-line no-console
      console.debug("Campaign Monitor POST subscription response", response);
    }

    return {
      success: true,
      email: response,
    };
  }
  catch (error) {
    // https://www.campaignmonitor.com/api/v3-3/subscribers/#adding-a-subscriber
    console.error("Campaign Monitor error:", error);

    return {
      success: false,
      message: "Internal error.",
    };
  }

try {
    const body: CampaignMonitorSubscriptionRequest = { EmailAddress: payload.email, Name: payload.name, Resubscribe: true, ConsentToTrack: "Yes" };
    const response: string = await $fetch(postUrl, { method: "POST", body: body, headers: { Authorization: `Basic ${authToken}` } });

    if (import.meta.dev) {
      // eslint-disable-next-line no-console
      console.debug("Campaign Monitor POST subscription response", response);
    }

    return {
      success: true,
      email: response,
    };
  }
  catch (error) {
    // https://www.campaignmonitor.com/api/v3-3/subscribers/#adding-a-subscriber
    console.error("Campaign Monitor error:", error);

    return {
      success: false,
      message: "Internal error.",
    };
  }

fmeyjr•12mo ago

Throw the error with createError

keco39•12mo ago

Instead of the "Internal error", I would like to "personalize" it according to the error message within the 400 response.

fmeyjr•12mo ago

Im on my phone but something like: Catch(e) { Throw createError({ status: 400, statusMessage: ‘error msg: ${e}’ }) I don’t have back ticks here. So obviously use back ticks 😂

keco39•12mo ago

Sure 🙂 Gonna try to see if I get more details from the error itself... Not really what I was hoping for 😦 This is what was returned (I put an extra try..catch in my page, calling my own API endpoint):

Campaign Monitor error in page: FetchError: [POST] "/api/newsletters/subscription?listid=...": 500 Campaign Monitor error: FetchError: [POST] "https://api.createsend.com/api/v3.3/subscribers/....json": 400 Bad Request
    at async $fetch22 (ofetch.00501375.mjs:261:15)
    at async subscribe (newsletters.vue:24:30)
    at async updateSubscription (newsletters.vue:55:5)

Campaign Monitor error in page: FetchError: [POST] "/api/newsletters/subscription?listid=...": 500 Campaign Monitor error: FetchError: [POST] "https://api.createsend.com/api/v3.3/subscribers/....json": 400 Bad Request
    at async $fetch22 (ofetch.00501375.mjs:261:15)
    at async subscribe (newsletters.vue:24:30)
    at async updateSubscription (newsletters.vue:55:5)

And this is what I see in Postman (status is 400 Bad Request)...

{
    "Code": -213,
    "Message": "Please provide a consent to track value."
}

{
    "Code": -213,
    "Message": "Please provide a consent to track value."
}

Just found this online...

console.error("Campaign Monitor error:", error.response._data);

console.error("Campaign Monitor error:", error.response._data);

Didn't know that was a thing (now I have to find the type of that error :)). Sorry for the question (but maybe the answer can help others).

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$fetch catches error, but not able to read body

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